Compare how you would model and récord finding the sum and difference of two rocks weighing 2/8 pound and 3/8 pound .

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?